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  <title>复位一个偏移位置的值</title>

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</div><hr /><div id="arrayaccess.offsetunset" class="refentry">
 <div class="refnamediv">
  <h1 class="refname">ArrayAccess::offsetUnset</h1>
  <p class="verinfo">(PHP 5 &gt;= 5.0.0)</p><p class="refpurpose"><span class="refname">ArrayAccess::offsetUnset</span> &mdash; <span class="dc-title">复位一个偏移位置的值</span></p>

 </div>

 <div class="refsect1 description" id="refsect1-arrayaccess.offsetunset-description">
  <h3 class="title">说明</h3>
  <div class="methodsynopsis dc-description">
   <span class="modifier">abstract</span> <span class="modifier">public</span> <span class="type"><span class="type void">void</span></span> <span class="methodname"><strong>ArrayAccess::offsetUnset</strong></span>
    ( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$offset</code></span>
   )</div>

  <p class="para rdfs-comment">
   复位一个偏移位置的值。
  </p>
  <blockquote class="note"><p><strong class="note">Note</strong>: 
   <p class="para">
    当使用 <a href="language.types.type-juggling.html#language.types.typecasting" class="link">(unset)</a> 进行类型转换时，该方法不会被调用。
   </p>
  </p></blockquote>
 </div>


 <div class="refsect1 parameters" id="refsect1-arrayaccess.offsetunset-parameters">
  <h3 class="title">参数</h3>
  <p class="para">
   <dl>

    
     <dt>
<em><code class="parameter">offset</code></em></dt>

     <dd>

      <p class="para">
       待复位的偏移位置。
      </p>
     </dd>

    
   </dl>

  </p>

 </div>


 <div class="refsect1 returnvalues" id="refsect1-arrayaccess.offsetunset-returnvalues">
  <h3 class="title">返回值</h3>
  <p class="para">
   没有返回值。
  </p>
 </div>




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